It is a very simple solution for a very strange problem. Googling also did not help me much in solving this. So, it should be useful for some one.
I was using ubuntu 7.10 Linux distribution with 2.6.22-14 kernel for the last 5 months in my Dell Inspiron 1420. My laptop is having intel 3945 ABG wireless card. Wireless networking was working fine with ipw3945 driver from intel. But for someother purpose, i installed one more kernel. But after rebooting, the wireless card itself was not detected by ubuntu. Checking with dmesg (This command will show the debug messages), i could able to see that it is giving error code -2 (File missing) for the firmware file for the driver ipw3945.
1. change the microcode firmware version. Means Get some other version of ipw3945.ucode file and replace the current one.
2. Install iwl3945 driver and corresponding firmware from http://intellinuxwireless.org
3. Try installing compat wireless package.
But none of these, solved my problem. Because all of these solutions are for driver and the corresponding firmware. For the problem was different. The udev version was wrong for the current kernel. udev is the device manager for the Linux 2.6 kernel series. Its primary function is managing device nodes in /dev. It is the successor of devfs and hotplug which means that it handles the /dev directory and all user space actions when adding/removing devices, including firmware load. The reason for this version mismatch was simple. During kernel compilation, i had to install one package from ubuntu. But it changed the dependency packages including udev also.
After installing the latest udev package in my system, wireless started working without any problem...:)
This link also will be useful, when you are getting any errors in linux. These are the common error codes in linux. http://lxr.linux.no/linux/include/asm-generic/errno-base.h#L5
I was using ubuntu 7.10 Linux distribution with 2.6.22-14 kernel for the last 5 months in my Dell Inspiron 1420. My laptop is having intel 3945 ABG wireless card. Wireless networking was working fine with ipw3945 driver from intel. But for someother purpose, i installed one more kernel. But after rebooting, the wireless card itself was not detected by ubuntu. Checking with dmesg (This command will show the debug messages), i could able to see that it is giving error code -2 (File missing) for the firmware file for the driver ipw3945.
ipw3945: Intel(R) PRO/Wireless 3945ABG/BG Network Connection driver for LinuxWhen i searched google for the solutions, most of the places three solutions was given
ipw3945: Copyright(c) 2003-2007 Intel Corporation
ipw3945: Detected Intel PRO/Wireless 3945ABG Network Connection
sda:<3>ipw3945: ipw3945.ucode firmware file req failed: Reason -2
ipw3945: Could not read microcode: -2
ipw3945: probe of 0000:03:00.0 failed with error -2
1. change the microcode firmware version. Means Get some other version of ipw3945.ucode file and replace the current one.
2. Install iwl3945 driver and corresponding firmware from http://intellinuxwireless.org
3. Try installing compat wireless package.
But none of these, solved my problem. Because all of these solutions are for driver and the corresponding firmware. For the problem was different. The udev version was wrong for the current kernel. udev is the device manager for the Linux 2.6 kernel series. Its primary function is managing device nodes in /dev. It is the successor of devfs and hotplug which means that it handles the /dev directory and all user space actions when adding/removing devices, including firmware load. The reason for this version mismatch was simple. During kernel compilation, i had to install one package from ubuntu. But it changed the dependency packages including udev also.
After installing the latest udev package in my system, wireless started working without any problem...:)
This link also will be useful, when you are getting any errors in linux. These are the common error codes in linux. http://lxr.linux.no/linux/include/asm-generic/errno-base.h#L5
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